@ dcb, I ruled out power supply etc because I have a lot of other games that I play such as Crysis & Far Cry 2 with absolutely no problems at all, however I do have an initial reset problem that could be the power supply, the game problem though I'm starting to think is
may be in OM nav training school, both resets occurred there, the second near way point 6, could some one else give it a go, help rule it out!
Cheers.